Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | ABB AO910 |
| Manufacturer | ABB |
| Product Category | Analog Output Module |
| Output Type | 4-20 mA / 0-10 V DC (software-configurable) |
| Channels | 8 channels (individually isolated) |
| Load Capacity | 4-20 mA: 0-750 Ω; 0-10 V: ≥2 kΩ |
| Accuracy | ±0.1% of span (±0.15% full scale) |
| Resolution | 15 bits |
| Update Rate | 10 ms per channel (max) |
| Isolation Voltage | 1500 V AC (channel-to-channel/channel-to-ground) |
| HART Support | Yes (FOUNDATION Fieldbus™ compatible) |
| Power Supply | 24 V DC (20-30 V DC range) |
| Power Consumption | 2.5 W (typical) |
| Operating Temperature | -25°C to +70°C |
| Communication Interface | S+ BUS (Symphony Plus DCS) |
| Safety Certification | SIL 2 (IEC 61508) |
ABB AO910
Product Introduction
The ABB AO910 is a high-performance analog output module engineered for ABB’s Symphony™ Plus distributed control system (DCS). It delivers precise control signals to field actuators—such as control valves, variable frequency drives (VFDs), and dampers—translating digital commands from controllers into stable analog outputs. Supporting eight configurable channels (4-20 mA or 0-10 V DC), the ABB AO910 ensures deterministic response for critical process control loops while providing galvanic isolation to eliminate ground loops and electrical noise interference.
As a core component of ABB’s S+ I/O series, the ABB AO910 integrates seamlessly with Harmony/INFI90 and Symphony Plus architectures. Its role extends beyond signal conversion: it enables HART® communication for smart device diagnostics, offers fail-safe output states, and features hot-swappability for maintenance without system downtime. Designed for reliability in demanding environments, the ABB AO910 is fundamental for executing control strategies in safety-critical applications, maintaining process stability, and ensuring operational continuity.
Core Advantages and Technical Highlights
The ABB AO910 combines precision, resilience, and intelligent features for superior control performance:
Precision Output Control: With ±0.1% accuracy and 15-bit resolution, the ABB AO910 delivers exact actuator positioning. Advanced digital-to-analog converters (DACs) and automatic drift compensation ensure long-term signal stability, critical for tight regulatory control (e.g., pH dosing, pressure regulation).
Triple-Isolation Architecture: 1500 V AC isolation per channel prevents cross-talk, ground loops, and high-voltage transients from damaging downstream equipment. Electromagnetic compatibility (EMC) exceeds IEC 61000 standards, ensuring noise immunity in electrically noisy plants (e.g., near VFDs or switchyards).
HART®-Embedded Intelligence: The module supports HART® 7 digital communication superimposed on analog outputs. This allows real-time diagnostics of valve positioners or I/P transducers—monitoring travel deviation, stiction, or calibration drift—without separate wiring. Predictive maintenance data reduces unplanned downtime by 30%.
Deterministic Response: A 10 ms update rate per channel guarantees timely execution of control actions, essential for fast processes like compressor anti-surge or burner management. Output slew rate limiting prevents mechanical stress on valves during setpoint changes.
Fault Tolerance and Safety: SIL 2-certified hardware includes open-circuit detection, short-circuit protection (25 mA limit), and configurable fail-safe states (hold last value/0%/100%). Hot-swap capability allows module replacement during operation, minimizing process disruption.
Robust Industrial Design: Operating at -25°C to +70°C with 95% humidity tolerance, the ABB AO910 withstands harsh substation or offshore environments. Corrosion-resistant terminals (Cr/Ni-plated) ensure longevity in chemical exposure zones.
Typical Application Scenarios
The ABB AO910 excels in scenarios demanding precise actuator control and diagnostics:
Power Plant Control: Modulates feedwater valves in boilers using 4-20 mA outputs with HART®-enabled valve diagnostics. The ABB AO910’s fast response prevents drum level excursions during load changes. SIL 2 compliance supports safety-related turbine control.
Oil & Gas Production: Controls choke valves on offshore platforms for wellhead pressure management. Galvanic isolation prevents cathodic protection system interference, while HART® verifies valve position during emergency shutdown sequences.
Chemical Batch Processing: Precisely doses additives via control valves in reactors. The module’s ±0.1% accuracy ensures recipe compliance, and fail-safe states (0%) halt dosing during sensor faults.
Water Treatment: Regulates pump speeds (via VFDs) for disinfection chemical injection. Open-circuit detection alerts operators to cable breaks, preventing undosed water discharge.
ABB AO910
Related Model Recommendations
ABB AI810: Analog input module; pairs with AO910 for closed-loop control (e.g., valve feedback).
ABB AO920: Successor model with SIL 3 certification and 16-bit resolution; upgrades AO910 for safety-critical loops.
ABB DSDO-01: 16-channel digital output module; complements AO910 in mixed I/O racks for motor control.
ABB CI854: PROFIBUS DP interface; integrates AO910 outputs into third-party safety systems.
ABB NINR-21: Redundant network module; ensures continuous communication to AO910 in high-availability systems.
ABB AC700F: Compact controller; processes logic for AO910-driven actuators in skid-mounted systems.
Installation, Commissioning and Maintenance Instructions
Installation Preparation: Mount the ABB AO910 vertically in an S+ I/O rack (HTTA/HTTW series) using DIN rail clips. Ensure ambient temperature <70°C and humidity <95% non-condensing. Use shielded cables (AWG 14-20) for outputs; ground shields at the module end only. Disconnect 24V DC power before wiring. Tighten terminals to 0.6 N·m. Verify load impedance compatibility (e.g., valve coils ≤750 Ω for 4-20 mA).
Maintenance Suggestions: Bi-annually, clean terminals with isopropyl alcohol. Verify output accuracy using a calibrated multimeter (±0.1% tolerance). Monitor HART® device alerts via Control Builder MT software. Replace if “COMM FAULT” LED illuminates red. For SIL 2 loops, perform full functional tests every 12 months. Keep firmware updated via S+ BUS. Always enable outputs after controller handshake to prevent actuator jumps.
Service and Guarantee Commitment
ABB provides an 18-month warranty for the ABB AO910, covering defects in materials and workmanship. Global technical support includes 24/7 access to ABB’s Ability™ Collaborative Operations Center for remote diagnostics and firmware patching. On-site commissioning assistance ensures optimal integration with Symphony Plus DCS. Spare parts remain available for 20+ years post-discontinuation. The module’s design complies with IEC 61131, ATEX, and IECEx standards, with certificates provided. ABB’s lifecycle management guarantees backward compatibility and migration path documentation for legacy systems.
